//package com.sangeng.filter;
//
//import com.alibaba.fastjson.JSON;
//import com.sangeng.constant.LoginConstants;
//import com.sangeng.constant.enums.AppHttpCodeEnum;
//import com.sangeng.domain.core.ResponseResult;
//import com.sangeng.domain.entity.LoginUser;
//import com.sangeng.utils.JwtUtil;
//import com.sangeng.utils.RedisCache;
//import com.sangeng.utils.WebUtils;
//import io.jsonwebtoken.Claims;
//import io.jsonwebtoken.JwtException;
//import org.springframework.beans.factory.annotation.Autowired;
//import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
//import org.springframework.security.core.context.SecurityContextHolder;
//import org.springframework.stereotype.Component;
//import org.springframework.util.StringUtils;
//import org.springframework.web.filter.OncePerRequestFilter;
//
//import javax.servlet.FilterChain;
//import javax.servlet.ServletException;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//import java.io.IOException;
//import java.util.Objects;
//
//@Component
//public class JwtAuthenticationTokenFilter extends OncePerRequestFilter  {
//
//    @Autowired
//    private RedisCache redisCache;
//    @Override
//    protected void doFilterInternal(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, FilterChain filterChain) throws ServletException, IOException {
//        // 获取请求头的token
//        String token = httpServletRequest.getHeader("token");
//        if (!StringUtils.hasText(token)) {
//            // 如果没有token，直接放行
//            filterChain.doFilter(httpServletRequest, httpServletResponse);
//            return;
//        }
//        // 解析获取userId
//        Claims claims = null;
//        try{
//            claims = JwtUtil.parseJWT(token);
//        } catch (JwtException e){
//            e.printStackTrace();
//            // token超时 token非法
//            ResponseResult responseResult = ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
//            WebUtils.renderString(httpServletResponse, JSON.toJSONString(responseResult));
//            return;
//        }
//        // 从redis中获取用户信息
//        LoginUser loginUser = redisCache.getCacheObject(LoginConstants.REDIS_LOGIN_KEY_PREFIX + claims.getSubject(), LoginUser.class);
//        // 如果每获取到则提示重新登录
//        if(Objects.isNull(loginUser)){
//            ResponseResult responseResult = ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
//            WebUtils.renderString(httpServletResponse, JSON.toJSONString(responseResult));
//            return;
//        }
//        // 存入SecurityContextHolder
//        // TODO 放入权限信息
//        UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(loginUser, null, null);
//        SecurityContextHolder.getContext().setAuthentication(authenticationToken);
//        filterChain.doFilter(httpServletRequest, httpServletResponse);
//    }
//}
